Name	Info	Provider	Link
Full text from AIR - Univ. Milan	free resource	Archivio Istituzionale della Ricerca Unimi	https://air.unimi.it/handle/2434/928767
Flu	free resource	MedlinePlus Health Information	https://medlineplus.gov/flu.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/34921508/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/34921508
	free resource	Wiley	https://onlinelibrary.wiley.com/doi/10.1111/irv.12940